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TM 55-1905-220-14-11
5-72.
FUEL INJECTOR - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-INSPECTION (Cont)
g. Check the seal ring area on the
injector body for burrs or scratches.
Also check the surface which
contacts the injector bushing for
scratches, scuff marks or other
damage. If necessary, lap this
surface. A faulty sealing surface
at this point will result in high
fuel consumption and contamination
of the lubricating oil. Replace
any loose injector body plugs or a
loose dowel pin. Install the
proper number tag on a service
replacement injector body.
h. Inspect the injector plunger and
bushing for scoring, erosion,
chipping or wear. Check for sharp
edges on that portion of the
plunger which rides in the gear.
Remove any sharp edges with a 500
grit stone. Wash the plunger after
stoning it. Injector Bushing
Inspectalite can be used to check
the port holes in the inner diameter
of the bushing for cracks or chip-
ping. Slip the plunger into the
bushing and check for free movement.
Replace the plunger and bushing as
an assembly if any of the above
damage is noted, since they are
mated parts. Use new mated factory
parts to assure the best perfor-
mance from the injector.
i. Injector plungers cannot be reworked
to change the output. Grinding
will destroy the hardened case at
the helix and result in chipping
and seizure or scoring of the
plunger.
5-1028


 


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